Quantum-well states in copper thin films

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	Quantum-well states in copper thin films
	R. K. Kawakami; E. Rotenberg; H. J. Choi; E. J. Escorcia-Aparicio; M. O. Bowen; J. H. Wolfe; E. Arenholz; Z. D. Zhang; N. V. Smith; Z. Q. Qiu
	1999
发表期刊	Nature
ISSN	0028-0836
卷号	398 期号:6723 页码:132-134
摘要	A standard exercise in elementary quantum mechanics is to describe the properties of an electron confined in a potential well. The solutions of Schrodinger's equation are electron standing waves-or 'quantum-well' states-characterized by the quantum number n, the number of half-wavelengths that span the well. Quantum-well states can be experimentally realized in a thin film, which confines the motion of the electrons in the direction normal to the film: for layered semiconductor quantum wells, the aforementioned quantization condition provides (with the inclusion of boundary phases) a good description of the quantum-well states. The presence of such states in layered metallic nanostructures is believed to underlie many intriguing phenomena, such as the oscillatory magnetic coupling of two ferromagnetic layers across a non-magnetic layer(1,2) and giant magnetoresistance(3). But our understanding of the properties of the quantum-well states in metallic structures is still limited. Here we report photoemission experiments that reveal the spatial variation of the quantum-well wavefunction within a thin copper film. Our results confirm an earlier proposal(4) that the amplitude of electron waves confined in a metallic thin film is modulated by an envelope function (of longer wavelength), which plays a key role in determining the energetics of the quantum-well states.
部门归属	univ calif berkeley, dept phys, berkeley, ca 94720 usa. lawrence berkeley lab, berkeley, ca 94720 usa. acad sinica, inst met res, int ctr mat phys, shenyang 110015, peoples r china.;qiu, zq (reprint author), univ calif berkeley, dept phys, berkeley, ca 94720 usa;qiu@socrates.berkeley
关键词	Magnetoresistance Superlattices
URL	查看原文
WOS记录号	WOS:000079135200038
引用统计	被引频次：114[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37389
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. K. Kawakami,E. Rotenberg,H. J. Choi,et al. Quantum-well states in copper thin films[J]. Nature,1999,398(6723):132-134.
APA	R. K. Kawakami.,E. Rotenberg.,H. J. Choi.,E. J. Escorcia-Aparicio.,M. O. Bowen.,...&Z. Q. Qiu.(1999).Quantum-well states in copper thin films.Nature,398(6723),132-134.
MLA	R. K. Kawakami,et al."Quantum-well states in copper thin films".Nature 398.6723(1999):132-134.